将字符转换为短字符

Question

我需要将数据从 2 个 char(8 位长)复制到一个 short(16 位长)。我尝试了两种不同的方法，但无法正常工作。

void char2short(char* pchar, short* pshort)
{
    memcpy(pshort    , pchar + 1    , 1);
    memcpy(pshort + 1, pchar    , 1);
}

还有一个:

void char2short(char* pchar, short* pshort)
{
   short aux;
   aux = ((*pchar & 0x00FF) << 8) | ((*(pchar+1) & 0xFF00) >> 8);
   *pshort = aux;
}

Answer 1

#include <stdio.h>


void char2short(unsigned char* pchar, unsigned short* pshort)
{
  *pshort = (pchar[0] << 8) | pchar[1];
}

int main()
{
  unsigned char test[2];
  unsigned short result = 0;

  test[0] = 0xAB;
  test[1] = 0xCD;
  char2short(test, &result);
  printf("%#X\n",result);
  return 0;
}

这将完成工作。